Isochron Scepter, Elder Druid, and To Arms!

Prerequisites

• Isochron Scepter on the battlefield
• Elder Druid on the battlefield
• To Arms! in exile

Steps

1. Activate any number of creatures you control by tapping them, adding at least
2. Activate Isochron Scepter by paying and tapping it, casting a copy of To Arms! without paying its mana cost
3. Resolve To Arms!, untapping all creatures you control
4. Activate Elder Druid by paying and tapping it, untapping Isochron Scepter
5. Repeat

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite storm count
• Near-infinite magecraft triggers
• Near-infinite untap of creatures you control
• Near-infinite mana creatures you control can produce